XML 77 R63.htm IDEA: XBRL DOCUMENT v3.21.2
Revenue from Contracts with Customers Accounted for in Accordance with ASC 606 - Additional Information (Detail) - USD ($)
Jun. 30, 2021
Dec. 31, 2020
Jun. 30, 2020
Disaggregation Of Revenue [Line Items]      
Accounts receivable $ 129,000,000 $ 118,000,000  
ASU 2014-09 [Member]      
Disaggregation Of Revenue [Line Items]      
Accounts receivable 97,000,000   $ 72,000,000
Contract assets 0    
Contract liability $ 0